Greenhouse water recovery system for crop production in semi-arid climate

Wanwiwat Lovichit, Chieri Kubota, Christopher Y. Choi, Jelle Schoonderbeek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The greenhouse is considered water use efficient compared to open-field production systems; nonetheless, conventional semi-arid greenhouses use large amounts of water, for both evaporative cooling and irrigation. The goal of this project is to examine the feasibility of installing a water recovery system for reducing semi-arid greenhouse water consumption. Specifically, we examined a water recovery system placed in the stream of the exhaust air of the greenhouse equipped with a fan and pad evaporative cooling system, where chilled water naturally generated and therefore this water can be used as an energy sink to recover the water via condensation. We monitored the dew point temperature of the greenhouse exhaust air (t dp) and the temperature in the pad sump water (potential coolant for condenser) (t fw1), in a commercial greenhouse (Willcox, AZ) to use the collected data in simulating amount of condensate water during the pre-monsoon (May-June, 2006) and the monsoon season (July-Sep, 2006). The energy balance model of condenser used in the simulation was validated by data obtained using a condenser unit placed under a semi-arid greenhouse condition. Comparing to water use in the plant canopy transpiration of 0.0036-0.0105 m 3 m -2 d -1 and 0.0033-0.0081 m 3 m -2 d -1 during the pre-monsoon day and monsoon day, respectively, our steady-state model simulated that, relative to minimum and maximum irrigation water use (min/max), 26.9%/9.2% and 15.1%/6.2% of water can be recovered in pre-monsoon day and monsoon day, respectively, when equipped even with the relatively inefficient (bypass factor =0.92) condenser units. If we improve the condenser efficiency to 50% (BF= 0.5), the proposed system could recover 100%/57.6% of irrigation water in pre-monsoon day and 94.3%/38.4% recovery in monsoon day. The result showed that integration of a water recovery system using the pad sump water as chilled water source into a pad and fan cooled semiarid greenhouse is technically feasible.

Original languageEnglish (US)
Title of host publication2007 ASABE Annual International Meeting, Technical Papers
Volume8 BOOK
StatePublished - 2007
Event2007 ASABE Annual International Meeting, Technical Papers - Minneapolis, MN, United States
Duration: Jun 17 2007Jun 20 2007

Other

Other2007 ASABE Annual International Meeting, Technical Papers
CountryUnited States
CityMinneapolis, MN
Period6/17/076/20/07

Fingerprint

Greenhouses
semiarid zones
Climate
Crops
crop production
greenhouses
Recovery
Water
condensers
water
Irrigation
fans (equipment)
Crop Production
irrigation water
dewpoint
Plant Transpiration
Fans
air
cooling systems
monsoon season

Keywords

  • Condensation
  • Controlled environment
  • Irrigation water use

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Engineering(all)

Cite this

Lovichit, W., Kubota, C., Choi, C. Y., & Schoonderbeek, J. (2007). Greenhouse water recovery system for crop production in semi-arid climate. In 2007 ASABE Annual International Meeting, Technical Papers (Vol. 8 BOOK)

Greenhouse water recovery system for crop production in semi-arid climate. / Lovichit, Wanwiwat; Kubota, Chieri; Choi, Christopher Y.; Schoonderbeek, Jelle.

2007 ASABE Annual International Meeting, Technical Papers. Vol. 8 BOOK 2007.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lovichit, W, Kubota, C, Choi, CY & Schoonderbeek, J 2007, Greenhouse water recovery system for crop production in semi-arid climate. in 2007 ASABE Annual International Meeting, Technical Papers. vol. 8 BOOK, 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States, 6/17/07.
Lovichit W, Kubota C, Choi CY, Schoonderbeek J. Greenhouse water recovery system for crop production in semi-arid climate. In 2007 ASABE Annual International Meeting, Technical Papers. Vol. 8 BOOK. 2007
Lovichit, Wanwiwat ; Kubota, Chieri ; Choi, Christopher Y. ; Schoonderbeek, Jelle. / Greenhouse water recovery system for crop production in semi-arid climate. 2007 ASABE Annual International Meeting, Technical Papers. Vol. 8 BOOK 2007.
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abstract = "The greenhouse is considered water use efficient compared to open-field production systems; nonetheless, conventional semi-arid greenhouses use large amounts of water, for both evaporative cooling and irrigation. The goal of this project is to examine the feasibility of installing a water recovery system for reducing semi-arid greenhouse water consumption. Specifically, we examined a water recovery system placed in the stream of the exhaust air of the greenhouse equipped with a fan and pad evaporative cooling system, where chilled water naturally generated and therefore this water can be used as an energy sink to recover the water via condensation. We monitored the dew point temperature of the greenhouse exhaust air (t dp) and the temperature in the pad sump water (potential coolant for condenser) (t fw1), in a commercial greenhouse (Willcox, AZ) to use the collected data in simulating amount of condensate water during the pre-monsoon (May-June, 2006) and the monsoon season (July-Sep, 2006). The energy balance model of condenser used in the simulation was validated by data obtained using a condenser unit placed under a semi-arid greenhouse condition. Comparing to water use in the plant canopy transpiration of 0.0036-0.0105 m 3 m -2 d -1 and 0.0033-0.0081 m 3 m -2 d -1 during the pre-monsoon day and monsoon day, respectively, our steady-state model simulated that, relative to minimum and maximum irrigation water use (min/max), 26.9{\%}/9.2{\%} and 15.1{\%}/6.2{\%} of water can be recovered in pre-monsoon day and monsoon day, respectively, when equipped even with the relatively inefficient (bypass factor =0.92) condenser units. If we improve the condenser efficiency to 50{\%} (BF= 0.5), the proposed system could recover 100{\%}/57.6{\%} of irrigation water in pre-monsoon day and 94.3{\%}/38.4{\%} recovery in monsoon day. The result showed that integration of a water recovery system using the pad sump water as chilled water source into a pad and fan cooled semiarid greenhouse is technically feasible.",
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N2 - The greenhouse is considered water use efficient compared to open-field production systems; nonetheless, conventional semi-arid greenhouses use large amounts of water, for both evaporative cooling and irrigation. The goal of this project is to examine the feasibility of installing a water recovery system for reducing semi-arid greenhouse water consumption. Specifically, we examined a water recovery system placed in the stream of the exhaust air of the greenhouse equipped with a fan and pad evaporative cooling system, where chilled water naturally generated and therefore this water can be used as an energy sink to recover the water via condensation. We monitored the dew point temperature of the greenhouse exhaust air (t dp) and the temperature in the pad sump water (potential coolant for condenser) (t fw1), in a commercial greenhouse (Willcox, AZ) to use the collected data in simulating amount of condensate water during the pre-monsoon (May-June, 2006) and the monsoon season (July-Sep, 2006). The energy balance model of condenser used in the simulation was validated by data obtained using a condenser unit placed under a semi-arid greenhouse condition. Comparing to water use in the plant canopy transpiration of 0.0036-0.0105 m 3 m -2 d -1 and 0.0033-0.0081 m 3 m -2 d -1 during the pre-monsoon day and monsoon day, respectively, our steady-state model simulated that, relative to minimum and maximum irrigation water use (min/max), 26.9%/9.2% and 15.1%/6.2% of water can be recovered in pre-monsoon day and monsoon day, respectively, when equipped even with the relatively inefficient (bypass factor =0.92) condenser units. If we improve the condenser efficiency to 50% (BF= 0.5), the proposed system could recover 100%/57.6% of irrigation water in pre-monsoon day and 94.3%/38.4% recovery in monsoon day. The result showed that integration of a water recovery system using the pad sump water as chilled water source into a pad and fan cooled semiarid greenhouse is technically feasible.

AB - The greenhouse is considered water use efficient compared to open-field production systems; nonetheless, conventional semi-arid greenhouses use large amounts of water, for both evaporative cooling and irrigation. The goal of this project is to examine the feasibility of installing a water recovery system for reducing semi-arid greenhouse water consumption. Specifically, we examined a water recovery system placed in the stream of the exhaust air of the greenhouse equipped with a fan and pad evaporative cooling system, where chilled water naturally generated and therefore this water can be used as an energy sink to recover the water via condensation. We monitored the dew point temperature of the greenhouse exhaust air (t dp) and the temperature in the pad sump water (potential coolant for condenser) (t fw1), in a commercial greenhouse (Willcox, AZ) to use the collected data in simulating amount of condensate water during the pre-monsoon (May-June, 2006) and the monsoon season (July-Sep, 2006). The energy balance model of condenser used in the simulation was validated by data obtained using a condenser unit placed under a semi-arid greenhouse condition. Comparing to water use in the plant canopy transpiration of 0.0036-0.0105 m 3 m -2 d -1 and 0.0033-0.0081 m 3 m -2 d -1 during the pre-monsoon day and monsoon day, respectively, our steady-state model simulated that, relative to minimum and maximum irrigation water use (min/max), 26.9%/9.2% and 15.1%/6.2% of water can be recovered in pre-monsoon day and monsoon day, respectively, when equipped even with the relatively inefficient (bypass factor =0.92) condenser units. If we improve the condenser efficiency to 50% (BF= 0.5), the proposed system could recover 100%/57.6% of irrigation water in pre-monsoon day and 94.3%/38.4% recovery in monsoon day. The result showed that integration of a water recovery system using the pad sump water as chilled water source into a pad and fan cooled semiarid greenhouse is technically feasible.

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